这里的第一个lambda表达是是一个mapper(映射器)(把每个元素和它的大小做映射)，第二个lambda表达是是一个reducer(化简器)，其取得两个大小数值并相加它们。

Here, the first lambda expression is the mapper (mapping each element to its size), and the second lambda expression is the reducer, which takes two sizes and adds them.

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最后，结合一个业务过程实例，根据转换规则把它映射为过程网，应用规则进行化简并得到验证结果。

Finally, following these rules, a procedure net example transformed from a business process is simplified, and the result is obtained.

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